Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b507fc5fe7b949…

MALICIOUS

PDF

218.1 KB Created: 2021-07-07 19:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f50476f4432b5917239dc2375309bafe SHA-1: 49b0059ef61080900251387ac13dd9b4daee4711 SHA-256: f3b507fc5fe7b949d2fbb3f5906d4d3e30bafc4d5ef21dd8065377320417078a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries or parcel deliveries. It contains numerous external links, many of which point to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crysiq.ru/uplcv?utm_term=whiteboard+drawing+animation
    • https://oteaexpert.fr/cite_imgs/file/61728866602.pdf
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/47666652100.pdf
    • http://skisun.it/userfiles/files/50207149105.pdf
    • http://antifftech.com/uploadfile/file///2021061813035620.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/81c77c8c52d5105d30737f6e638f7cc0/sesezumupivigolimitazono.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/36b42c72f8e2de97f03f47231da4abac/duzivejorefalezolobuto.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb841949e8---12538531376.pdf
    • https://arch.ua/ckfinder/userfiles/files/74289931508.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/745cb2fdc6b0f031111018e1c68b5185/remuvusorudom.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fe3bd4c1e---74724662112.pdf
    • http://abw10thstreetne.com/uploads/files/rewupig.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/ikjflgh5hc667m312867slaev0/tilibusixomorivesibifi.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/p1kgq23nr615kgq1kco6da1isv/47630965311.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/af954ecf55a78f70987304aa88f158c0/dunegifanaleden.pdf
    • http://globalquestconsulting.com/userfiles/files/78346754716.pdf
    • http://alphasigmaoverseas.com/userfiles/file/72485660400.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/th1jeodjj5ickqctorvijfpeqn/20694022886.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ec7b259024a5d1a2dda7ee4e9cbb32e5/12811211324.pdf
    • http://1mosref.ru/ckfinder/userfiles/files/varoxepaxebo.pdf
    • http://alternatifmedikal.com/img/userfiles/files/fejapewodenikowinizutum.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cdbe2cf378b---xixexiv.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d469becf45a---12897466945.pdf
    • http://vaikevai.com/ckfinder/userfiles/files/zezamezowi.pdf
    • https://vildmarksjagt.dk/userfiles/file/pawogozakelofekerew.pdf
    • http://tfforming.ru/d/files/wofetovowusife.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e965.bin
49eb4421dd4b82acd90fd1c9831bacbb77a0005d4f6fcb6401f9d19282965464
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E965 2900 bytes
font_01_sfnt_off0002f5b0.bin
65723d2ef2e7606037fe302c5b6b7572a71ce69f44758aee991693db9988382e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5B0 10700 bytes
font_02_sfnt_off00030dd6.bin
aca1ed2d5557139279c12b9b10acd76dd4f479ce270758483006ed97d7f3cd07
pdf-font-stream PDF embedded font (sfnt) at offset 0x30DD6 20504 bytes
font_03_sfnt_off0003425b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3425B 16792 bytes